There's some subtlety regarding what climbers expect from prusik cord, vs what arborists expect from what I can tell - with us in the middle.
I am finding that out also. IMO, that Is a spot on observation!
I’ve done some more research today. From what I can tell from my very short research. ... Climbers here seem to not think about friction hitch usage for life support. Also, there seems to be more tieing in to harness without usage of biners. And usage of dynamic cordage. Arborists seem to be more aligned with what we do, but don’t take into account lower weight / lower bulk. And their safety ratings are probably tied to regulation. So overkill on safety requirements.
I also used fall force calculators and I see that, with my body weight and gear (300 lbs), a 20’ fall would generate 8.13 kN. And the jammy @22kN, reduced by 40% due to knots (which I believe is a rather high number estimate), would be 13.2kN breaking strength.
According to my calculations, If I was able to get to a height of 20’ 1” and had 20’ slack, and fell (oplux/jammy/biner/RC Harness), my body would not hit the deck (my gear would not fail). That said, my body would most likely be broken beyond repair from the sudden stop with the static system.
Where I stand now, I am going forward with the oplux/jammy/distel. I will add another twist to the poachers knots that attach the jammy to the biner (over abundance of caution about possible slippage of cordage).
As usual for me, I always back up my LB and tether with an alpine butterfly attached to the biner behind the distel. May be overkill, but it gives me peace of mind.
Also, the most important take away for me is that I should always minimize slack in my system at all times. I think my body will give out way before the gear does.